Two of us had a great stay at Harnpon's apartment. With the monthly discount, it was excellent value for money considering the location. You are not too far away from Siam (north), Bang Rak (west), Sathon (south) and Lumphini park (east). There are plenty of food options in the area within easy walking distance.
The apartment is nicely designed and there was good space for home working which was important for us due to the covid situation. Note, the apartment is on the ground floor so there are no views and above the parking lot for the building. However, this didn't cause any issues or disturbance for us. The blackout curtains were very handy. There is a keypad system so no need for any physical keys/cards. The building is close to a small water canal so you can get some unpleasant smells from time to time if you leave on the AC.
Harnpon kindly offered a free weekly cleaning service where the maid changed the bedsheets/towels as well as general cleaning and wiping. There is a cheap water refill station for the building (Surawong Classic Place) and coin-operated washing machines (although, you are better off using Otteri Wash & Dry self-service laundromat down the road which is new and modern).